Citazione APA

Pennell, M. E., Cusack, A. M., & Davis, M. (1929). Friends: A primer. Ginn and Company.

Stile di citazione Chicago

Pennell, Mary E., Alice M. Cusack, e Marguerite Davis. Friends: A Primer. Boston ; New York ; Chicago ; London ; Atlanta ; Dallas ; Columbus ; San Francisco: Ginn and Company, 1929.

Citazione MLA

Pennell, Mary E., et al. Friends: A Primer. Ginn and Company, 1929.